Trying to approve time and I get this error Error exporting error code: 6310, QB detail: You must select Customer on timesheet marked as Billable. (ts_id: 27964800)?

Thank you for bringing this to our attention, Mike. I'll help you resolve the issue when exporting in QuickBooks Online (QBO).

You can go to QuickBooks Time. From there, go to the preferences and ensure to uncheck the billable check mark.

Here's how:

1.  At the top right, select QuickBooks. 
2. Go to the Preferences.
3. Select the billable option (also check to Require Billable Yes/No if you would like this field required). 

Once done, go back to QB time, then import changes. You can then try to export again.

Here's an article for more insights about tracking and exporting time: About QuickBooks integration preferences in QuickBooks Time.

You may want to check out the available TSheets reports to review your employees' time data: TSheets reports.

Let me know if you need further help with exporting data in QuickBooks Online. I'm always glad to help in any way I can. Have a great rest of the day!

I am getting the same error.  I reached out this week and was able to getting past this error with QBs help.  However, the error is back again for approving time.  The error did not start until I put in a new option year for the contract we are supporting.  It is like the new contract year has some kind of linking issue back to the time keeping portion.

Rest assured, we're here to guide you in the right direction to resolve the error message you encountered when exporting time in QuickBooks Online (QBO), @MCLS.

Error 6310 occurs when you export a timesheet marked as billable but haven't selected a customer. That said, ensure a customer is assigned to the billable entries before exporting again.

If the error persists, I recommend contacting our customer support team again. This way, they can instruct you through a screen-sharing tool with the necessary solutions, showing you what settings to adjust to resolve the error code 6310.

To do that:

1. Go to the Help icon.
2. Enter a brief description of your concern in the search field.
3. Select Contact Us.
4. Choose between Chat with us and Have us call you.

Furthermore, I'll leave this article available as a guide in invoicing your customers for project-related expenses: Invoice customers for project expenses in QuickBooks Online.

We look forward to assisting you if you have additional questions about exporting time entries in QBO. Our support team is only a few clicks away. Have a great day ahead.